Add application to Windows startup in C#?

I want to add my application to Windows startup programatically. I am using the below code. But when I shut down and start Windows again then my application doesn't start.

public static void AddApplicationToStartup()
   {
     using (RegistryKey key = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true))
      {
        key.SetValue("My Program", "\"" + Application.ExecutablePath + "\"");
      }
   }